TC4xx promo banner Banner_Aurix_Competition Banner_AURIX_Security-Solution Banner_AURIX_Safety_Products ShieldBuddy TC275 Banner_AURIX_DevelopmentStudio


+ Reply to Thread
Results 1 to 6 of 6

Thread: Question on TLF35584 Fail Safe State

  1. #1
    Intermediate Intermediate nadeem_syed is on a distinguished road
    Join Date
    Jul 2020
    Location
    USA
    Posts
    112
    Points
    920

    Question on TLF35584 Fail Safe State

    Hello,

    I have below question about TLF35584 device functionality. Can you please clarify ?

    Item#1: I am trying to create below failure scenario.
    1. Apply VBATT/12V to TLF35584
    2. Observed that Rest pin of MCU is released by TLF35584 and all power supplies are up and running
    3. Creating a MCU stuck fault scenario (This means no SPI communication or watchdog refresh from MCU)
    4. Observed that after 600ms TLF35584 pulls reset pin low for 20ms and then releases Reset pin of MCU
    5. Again Creating a MCU stuck fault scenario (This means no SPI communication or watchdog refresh from MCU)
    6. Observed that after 600ms TLF35585 pulls reset pin low and remains low
    After Step#6, If I apply Enable/Key-On the TLF35584 device is not recoverable

    Is this behavior correct ?
    Question#1.1: In Step#6, based on datasheet I thought TLF35584 will try to reset MCU at-least 3 times, however there is no retry from TLF35584 device ? Am I missing something ?
    Question#1.2 In this case why Enable/Key-On is not able to recover TLF35584 device ?

  2. #2
    Intermediate Intermediate nadeem_syed is on a distinguished road
    Join Date
    Jul 2020
    Location
    USA
    Posts
    112
    Points
    920
    Dear Community Members,

    Any thoughts on above questions ?

  3. #3
    Intermediate Intermediate nadeem_syed is on a distinguished road
    Join Date
    Jul 2020
    Location
    USA
    Posts
    112
    Points
    920
    Can anyone provide some insight on this behavior of TLF device ?

  4. #4
    Beginner Beginner
    Infineon Employee
    Infineon Employee
    Scott Winder will become famous soon enough
    Join Date
    Jun 2019
    Posts
    28
    Points
    382.5
    Hi Nadeem,

    On the AURIX side, do you have PORST connected to the TLF35584 reset output? Or ESR0?
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

  5. #5
    Intermediate Intermediate nadeem_syed is on a distinguished road
    Join Date
    Jul 2020
    Location
    USA
    Posts
    112
    Points
    920
    Quote Originally Posted by Scott Winder View Post
    Hi Nadeem,

    On the AURIX side, do you have PORST connected to the TLF35584 reset output? Or ESR0?
    Hi Scott,

    I am using TC377 and in my design, TLF's ROT (Pin 17) is connected to TC377's PORST (G17 pin BGA package)

  6. #6
    Advanced Advanced
    Infineon Employee
    Infineon Employee
    MoD is on a distinguished road
    Join Date
    Feb 2012
    Location
    Munich
    Posts
    270
    Points
    5449.375
    How you have connected ENA and WAK? How you make the Enable/Key On?
    The views expressed here are my personal opinions, have not been reviewed or authorized by Infineon and do not necessarily represent the views of Infineon.

+ Reply to Thread

Tags for this Thread

Disclaimer

All content and materials on this site are provided “as is“. Infineon makes no warranties or representations with regard to this content and these materials of any kind, whether express or implied, including without limitation, warranties or representations of merchantability, fitness for a particular purpose, title and non-infringement of any third party intellectual property right. No license, whether express or implied, is granted by Infineon. Use of the information on this site may require a license from a third party, or a license from Infineon.


Infineon accepts no liability for the content and materials on this site being accurate, complete or up- to-date or for the contents of external links. Infineon distances itself expressly from the contents of the linked pages, over the structure of which Infineon has no control.


Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Usage Terms of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Usage Terms of this site. Infineon reserves the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.